Integrate andygoth-changes for broader testing and comment. This change should be fully backward-compatible, unless of course a script depends on the help text never changing or new options never being added. All existing options and defaults should work identically to before. I had planned to update the ls command to use the same backend as changes/status, but that work will have to wait until we decide if the ls options should be redesigned. The SCAN_MTIME, SCAN_SIZE, C_MTIME, and C_SIZE flags are currently unused and can be removed, but their presence harms nothing, and they should be useful for a basis for an updated ls command, though they may need modification to address confusion between commit time, on-disk mtime, checked-in size, and on-disk size.
(check-in: 7c8cc2ad user: andygoth tags: trunk)